:relfileprefix: ../../../
[#boost-urls-params_ref-clear]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/params_ref.adoc[pass:[params_ref]]::clear


Clear the contents of the container


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_ref.hpp#L280[boost/url/params_ref.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
void
clear() noexcept;
----

== Description




All iterators are invalidated.

=== Effects
[,cpp]
----
this->url().remove_query();
----

=== Postconditions
[,cpp]
----
this->empty() == true && this->url().has_query() == false
----

=== Complexity

Constant.

=== Exception Safety

Throws nothing.